Q: Will the pump always stay running when relay jumpered or is there a safety that shuts it off after a few seconds?

I have pulled the relay and jumped properly and when I turn the key on I hear a small whirring noise which then stops after a few seconds...wasn't sure if maybe there is a pressure cutoff in the fuel pump that stops the pump from over-pressuring the lines or not, but if I spray starter fluid into the intake MAF port the car will start and run for a couple of seconds and then quits.

There is one more test I want to try to confirm that it is the fuel pump...If I disconnect the fuel hose from the fuel injector rail and turn the key on, theoretically the pump should just stay on at that point and I should start gushing at the back. If I do have fuel delivery to the injector rail, what would be my next step?

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This post was auto-generated based upon a question asked on our tech article page here:

Put the fuel hose you disconnected from the rail into an empty gallon container. Jump the fuel pump relay and the pump should stay running as long as the relay is jumped, otherwise you have a bad pump. If the pump stays running while the relay is jumped then you probably have a bad relay. There is no safety shut off. With the engine not running the PCM will only activate the fuel pump for a few seconds to prime the system. It will then reactivate the relay when it sees a crank signal from the engine spinning

- Nick